Translated from the site:
"The flag of the [Swiss-like] Canton was created through
Municipal By-Law of 11th July 1948 and its blue and white colours
represent Ecuatorian Liberalism since Giro'n was one of the first
villages to join the official 1895 coup d'etat. The By-Law
decreed under Ricardo Torres Rivas' presidency establishes that
it [the flag] shall bear the official coat-of-arms in its central
part."Santiago Dotor, 10 June 1999

Giron Canton was established on 26 August 1897. Jens Pattke, 14 August 2003

The image above is based on <www.ame.gov.ec>.Falko Schmidt, 30 June 2007

There are the improved images a from the
official document online as reported by Falko Schmidt, 29 October 2002.António Martins-Tuválkin, 25 April 2010